Message Routing is a new feature in SATELLINE-3AS modems, which makes it easier to build up a large radio modem network. The SATELLINE-3AS software includes a selectable error correction, which improves the functioning of the radio modem under interference. SATELLINE-3AS is compatible with the interface types RS-232, RS-422 and RS-485. Without changing the hard-ware all the parameter settings of the radio modem can be modified through the interface from a PC. The model SATELLINE-3ASd is equipped with a LCD display of its own, which facilitates programming of the radio modem.
- High Speed Radio Modem with advanced data transfer characteristics
- Data speed in the air 19200 bit/s at 25 kHz and 9600 bit/s at 12.5 kHz
- RS interface data speed 300…38400 bit/s
- Interfaces RS-232, RS-422 or RS-485
- LCD display and four push buttons in 3ASd
- Error correction (FEC)
- Repeater function
- Programmable output power 10 mW…1 W
- Free Channel Scanning (FCS)
- Show message on display -feature
Large Radio Modem Network
The amount of data transferred in a local area data communications network exhibits a tendency of continuous growth. On the other hand, the average size of communi cations systems are increasing. Satel’s response to these market tendencies is the SATELLINE-3AS radio modems with Message Routing, a characteristic for networking radio modems within a system. Message Routing features a versatile radio protocol, which takes care of routing messages across a radio modem network. Communication is completely transparent, which makes Message Routing directly compatible for most user protocols. Even though the network can cover large areas with multiple hops and repeater stations, only one radio channel is required. Any radio modem in the network can act as a repeater station keeping infrastructure expenses low. Message Routing has two operating Modes to suit the various requirements of different users: Source Mode and Virtual Mode. Virtual Mode has the smallest possible overhead for fast operation identification. Source Mode uses a slightly longer header than Virtual Mode to enable more versatile network handling. In Source Mode it is possible to design failure handling features right in the network, and to use mobile stations.
Dual Band Version
The SATELLINE-3AS(d) modem is available also as a “Dual Band” version. The transceiver of the radio modem offers as an option two 2 MHz frequency bands, tuned at the factory with a maximum separation of 15 MHz between the highest and the lowest frequency. The radio modem can be reprogrammed to operate at any channel within those two bands.